Translate-Dub

Translate-Dub is a free web tool for translating and dubbing audio and video. You upload a file in formats such as MP4, MOV, WebM, MP3, M4A, OGG, FLAC or WAV up to 4 GB, pick one of 11 languages, and choose whether you want translated captions, a new voice in the new language, or a new voice plus on-screen captions. A short preview lets you hear the voice and check the captions before you get the full video.

Options after upload include a male or female voice, caption styles with fonts, colors, boxes and borders, and caption position and text size. Targets include European languages (Spanish, French, German, Portuguese, Italian and English), Hindi, Arabic, and Japanese, Korean and Chinese. Neither the preview nor the final video has a watermark, and your original file is not changed because a new file is created.

The site says the tool is free with no account or monthly plan, and it notes that the new voice may not match lip movements exactly. It suits social videos, lessons and demos, and also offers related video-to-text and audio-to-text tools.